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Patent Searching and Data


Matches 301 - 350 out of 11,263

Document Document Title
WO/1990/015476A1
A driving system capable of producing large driving force to drive a load and positioning it rapidly with high accuracy by use of a controller capable of driving a motor at a high speed with high torque and high efficiency. When target p...  
WO/1990/001231A1
A motor is disclosed comprising a housing (5) and a plurality of parallel stator laminations (4) mounted on the interior wall of the housing surrounding the rotor (3). The stator (4) comprises a plurality of coils (28) wound around the s...  
WO/1989/008349A1
Two-state, bilateral, single-pole, double-throw, half-bridge power-switching apparatus capable of high speed, high current switching over a duty factor range of 0 % to 100 % includes a single-wire connector (104) to a source (101) of swi...  
WO/1989/007789A1
A digital follow-up system comprises a synchronous machine (1), on the shaft (2) of which is mounted a position pick-up (3) connected through its output (4) to a unit (6) for determining the code of the displacement angle between the act...  
WO/1989/007859A1
High resolution microstepping of a unipolar d.c. motor (18) is accomplished by applying from a look-up table the values of the SINE and COSINE of a given angle to the control circuit of a unipolar d.c. motor. The difference between the p...  
WO/1989/005539A1
In driving motors for continuous and positioning operation, two different types of rotor, corresponding to the type of operation, are controlled by two different stators. The driving motor (1) according to the invention is of simple desi...  
WO/1989/004085A1
A method and apparatus for controlling stepmotors (24, 124) having a broad range of applications including fuel control for gas-turbine engines, and operating powered automatically controlled doors (140) for mass transit vehicles is disc...  
WO/1988/008641A1
A control system for a stepping motor includes first and second pairs (W1, W2) of complementary windings. The windings are coupled via respective switching devices (T3-T6) to ground, a low voltage source is coupled via diodes (CR6, CR7) ...  
WO/1988/005185A1
An apparatus and method for operating a plurality of stepper motors (95). A controller operates a plurality of sequentially connected stepper motors (95) executing substantially the same motion. The apparatus includes an incremental cont...  
WO/1987/005755A1
A device for detecting the rotational position of the rotor of a motor, which is capable of detecting the absolute rotational position of the rotor shaft of the motor over one turn of the rotor shaft, and which is also capable of detecti...  
WO/1985/004269A1
A permanent magnetic stepper motor (10) apparatus which provides high constant torque and constant speed through a large stepping angle under varying output shaft load conditions. The apparatus includes a rotor (12), a plurality of stato...  
WO/1985/004061A1
A novel method of controlling a stepping motor comprises applying pulsed power (P1, P2) to one or two phases (1, 2) of the motor for variable pulse duration varied according to a programme in successive steps (P1, P2; P5, P3; P6, P4), th...  
WO/1985/000708A1
The method includes varying the width of the high level drive impulses of a bi-level drive system based on the desired speed to be achieved by the stepper motor. A microprocessor is used to vary the pulse width.  
WO/1984/003013A1
A "H" switching circuit (10) for providing current drive to a load coupled between first (20) and second (22) outputs thereof comprising first and second paired switching transistor circuits each including an upper transistor (12:16) tha...  
WO/1983/002695A1
A stepper motor control circuit includes a waveform generator circuit (301, 302, 303, 304, 305) which produces two identical substantially stepless symmetrical waveforms (preferably of triangular configuration) at a frequency which can b...  
WO/1983/001156A1
The electric machine according to the invention comprises an iron-free rotor provided with two windings (1, 2) each of them being formed by a plurality of coil elements (11, 12, 13 and 21, 22, 23). The elements (11, 12, 13) of the first ...  
WO/1983/000571A1
An adaptive motor pulsing apparatus (36) for a driven element (32) positioning system which divides the available time between recurring motor (36) on periods and motor (36) off periods, and which also varies the duty cycle of the motor ...  
WO/1982/002962A1
Microprocessor controlled micro-stepping chart drive circuit. The invention comprises a step clock system (10), a microprocessor controller (12) and a motor drive circuit (16). A speed selector (14) establishes a numerical constant withi...  
WO/1982/002127A1
A digital servo control system for a d.c. motor (20) to achieve stepping motor precision and a wider speed control range than either a conventional d.c. motor or a stepping motor, as may be typically utilized in an IV syring pump. Motor ...  
WO/1981/002207A1
This control device is used in connection with a motor comprising a magnetic rotor and at least two magnetic stator circuits coupled with respective coils (b1, b2). A logic circuit (21) is arranged to alternatively feed drive pulses to b...  
WO/1981/001084A1
A circuit arrangement for an asynchronous motor drive of controlled stepping, i.e. for control of the number of revolutions of asynchronous squirrel-cage motors, in which the output of the supply unit is connected to a potentiometer, the...  
WO/1980/002461A1
Electronic circuits mounted on printed circuit boards, particularly circuits used for television receivers, are placed on a palette which is transferred by a conveyer. During transfer, test probes check whether or not the necessary parts...  
WO/1980/002492A1
A driving apparatus for a plurality of pulse motors for simultaneously carrying out adjustments of a plurality of adjusting points which are interdependent. Driving devices (222X to 222Z) that are rotatably driven by a plurality of pulse...  
JP2019015867A
[Subject] When making an iris diaphragm drive and adjusting exposure in the case of animation photography, a control device which can raise the linearity of a luminance transition by drive of an iris diaphragm is provided. [Means for Sol...  
JP6456212B2  
JP6455247B2  
JP6456211B2  
JP6456210B2  
JP2018207733A
[Subject] Control of a motor may become unstable, if control of a motor is started based on the initial phase concerned after a determined initial phase has differed from an actual rotation child's rotation phase. [Means for Solution] Ph...  
JP2018207607A
[Subject] A high frequency noise is controlled in a micro step drive of a stepping motor. [Means for Solution] Motor controlling device 100 drives a switching element of H bridged circuit 20 and this H bridged circuit 20 by a PWM signal,...  
JP2018204883A
[Subject] When using DC pulse motor as a source of rotation of an air cooling fan which carries out forcible cooling of the condensation machine of a freezer, the existing DC pulse motor may be exchanged for new DC pulse motor. If motor ...  
JP2018207769A
[Subject] A drive circuit which mounted an addition function is provided, without increasing the number of pins. [Means for Solution] Direction setting pin DIR receives direction indication signal ROT which shows the hand of cut of stepp...  
JP6438906B2  
JP2018198517A
[Subject] The rotating operation control device, image forming device, and the rotating operation control method of performing rotation control of a more efficient accurate stepping motor are provided. [Means for Solution] RAM1401 which ...  
JP2018196247A
[Subject] When carrying out assistant control of several motors by which the kind and driving load of a motor differ from each other, the Evacuation tone of a motor is prevented certainly. [Means for Solution] An image forming device is ...  
JP2018196206A
[Subject] A stepping motor drive and a stepping motor drive method which can realize the high-speed drive are provided, controlling generation of heat and vibration of a stepping motor. [Means for Solution] Stepping motor drive 10 is pro...  
JPWO2017141994A1
The magnetized rotor (21), and the 1st and the 2nd stator pole section which are countered and provided via a rotor (21), The 3rd stator pole section that the 1st and 2nd stator pole sections do, faces a rotor, and is provided, The stato...  
JP2018196275A
[Subject] A control method for shortening convergence time until a rotor of a stepping motor stops is provided. [Means for Solution] A control method rotates a rotor using a magnetization method which magnetizes simultaneously two stator...  
JP6434332B2  
JP2018191460A
[Subject] A control device in which smooth acceleration and deceleration are possible is provided, securing a dynamic range of revolving speed of a stepping motor. [Means for Solution] A creating means (106) in which a control device (10...  
JP2018191461A
[Subject] A control device which can reduce a difference in motor revolving speed in the case of a change to open loop control and feedback control is provided. [Means for Solution] A control means (210) which is a control device which c...  
JP6429598B2  
JP6430695B2  
JP2018184061A
[Subject] A display for vehicles to which a movable object can be moved to a desired position is provided controlling vibration. [Means for Solution] It is arranged a seat part and inside a seat part, and a display for vehicles is a mova...  
JP6425305B2  
JP2018182895A
[Subject] While performing rate control of a stepping motor according to the operation based on a physical theory, it enables it to suppress a circuit scale and processing time. [Means for Solution] In order that step time operation part...  
JP2018182879A
[Subject] A control device of a stepping motor which can control volume of sound which occurs with a drive of a motor is provided. [Means for Solution] A control device of a stepping motor makes an absolute value of exciting current of A...  
JP2018182808A
[Subject] Reduce rotation unevenness of a stepping motor. [Means for Solution] The 1st stator that a stepping motor of an embodiment has a rotor which has a magnet, and a coil, and forms a magnetization vector in the 1st phase, It has th...  
JP2018182793A
[Subject] Reduce rotation unevenness in a stepping motor. [Means for Solution] A stepping motor of an embodiment is provided with a rotor which has a permanent magnet by which multi-electrode magnetization is carried out in a peripheral ...  
JP2018183033A
[Subject] An actuator which controls wrong detection of a position of an output axis is provided. [Means for Solution] A pulse generation part which generates a pulse signal according to the degree of rotation angle of an output axis whi...  

Matches 301 - 350 out of 11,263